Skip the auto shop - Our mechanics make house calls

Q: Kia Cerato 2011 jerks when accerating

asked by on

When I initiate drive and accelerate the engine, the car jerks. I also noticed the check engine light comes on and blinks. As I get to about 50Km/Hr I hear a humming sound too with some vibration. It is more eminent when I am using the car air conditioning system and / or the rear screen heater.

A: Your car’s engine intake system has somethi...

Your car’s engine intake system has something called a mass air flow sensor that monitors air intake as it is mixed with fuel prior to being injected into the motor. When this fails, this can cause an imbalanced air/fuel load to be supplied to the motor which results in an over fueling or under fueling situation depending on the conditions. This may cause a hesitation, loss of power or jerking reaction when this sensor is malfunctioning. When this is not working properly, you may also notice a strong smell of fuel. I would suggest having a professional from Your Mechanic come to your home to diagnose your mass air flow sensor.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Misfire bank one 4x4 light will not go off

Is there a severe lack of power along with the misfires? A clogged catalytic converter can cause misfires and cause the check engine light to flash. These trucks are sensitive to the type of air filter used and using the...

Q: Charging system

Hi There, it sounds like you may have a problem with your charging system maintaining your battery. You may have a failing voltage regulator that could be allowing the alternator to supply too much or too little amperage to the...

Q: How do I fix my gauges on my dashboard?

Hi there, thanks for writing in. Typically when all of the gauges on the dash are malfunctioning, it's usually the electrical relay as opposed to a fuse. The best way to know for certain is to contact one of our...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...